I updated my IPhone 3GS to the new 5.1 operating system and have since had a range of problems with not only my phone but also my IPad.

Question

I updated my IPhone 3GS to the new 5.1 operating system and have since had a range of problems with not only my phone but also my IPad.
Programs (Safari, mail, messages) keep crashing, mail will not delete properly (some will keep popping into my inbox again for no reason!!!), slow, settings lock up etc. etc.
This only seemed to become an issue once I updated to ios 5.1 and funnily also affected my Ipad even though i hadn't updated the software yet. I have since updated the software on my ipad thinking it might help too but that only made things worse!! So I am not sure if it's an ICloud issue, but when i try to disable ICloud my devices lock up as well.
The battery life is also shocking!!
I have hard reset both devices, restored both devices, reset the setting and tried a whole host of other suggestions (like closing background programs) on this forum buit nothing works and i am tearing my hair out.
I looked in the phone and ipad log and there do seem to be low memory reports though i don't know why these are occuring now when they never have before??
I don't know if I can restore the old operating system (If I can please let me know how). The phone or ipad are not jailbroken.

Answer 1

but you should have a backup in itunes.
Every time you sync your iOS device iTunes creates a backup. go check if its there, iTunes Preferences >Devices. and there you should see if you have a backup, and in case from which date the backup is.
And ofcourse you can get your icloud data back by just logging in with your Appleid under icloud in settings on the iphone.
But anyway, if the iPhone works when you restor it as new: try adding your backup, and see if the issue comes back. And experiment with your backup and try to work out what is causing the issue, my guess is that its some app!   Good Luck!